Robot Dreams - By Isaac Asimov Page 0,1

things would be inevitable. However, I also described the psychological effects and thought of one that was rather unusual - particularly for me.

I am, you see, a pronounced acrophobe with an absolute terror of heights and know perfectly well that I will never voluntarily go on a spaceship. If, however, I were somehow forced on one, I know, too, that I would never dare leave it for a space walk. Nevertheless, I put personal fear to one side and imagined the space walk to produce euphoria. I had my space travelers quarrel over whose turn it was to get out into space and drift in quiet peace among the stars. And when space walks became fact, such euphoria was felt.

In my story, "The Feeling of Power," published in 1957, I made use of pocket computers, about a decade before the real thing came along. I even considered the possibility that such computers might seriously decrease the ability of people to do arithmetic in the old-fashioned way, and that is a real concern of educators now.

As a final example, in my story "Sally," published in 1953, I described computerized cars that had almost reached the stage of having lives of their own. And, in the last few years, we do indeed have computerized cars that can actually talk to the driver - although their abilities in this direction are, as yet, very simple.

Yet, if there is the possibility of this satisfaction from accurate prophecy in science fiction, there is also the reverse. Science fiction offers its writers chances of embarrassment that no other form of fiction does.

After all, if we may prove accurate in our predictions, we may prove inaccurate as well, sometimes ludicrously so.

Such embarrassment becomes particularly acute when one's stories are reprinted in a collection such as this one. When an author starts young, lives out a normal lifetime (as I seem to be doing) and has written continuously, there is likely to be included in the collection stories that were written and published thirty and forty years before and that leave ample scope for any cloudiness in the crystal ball to show up.

This doesn't happen to me as often as it might, for I have several things going for me. In the first place, I am well acquainted with science and am not likely to be wrong in fundamentals. Secondly, I am cautious in my predictions and do not flail away madly in contravention of scientific principles.

Nevertheless, science does advance and sometimes produces completely unexpected results in a very few years, and this may leave a writer (even me) high and dry on a pinnacle of false "facts. " The worst luck I had in this respect turned up in connection with a series of science fiction novels I wrote for youngsters between 1952 and 1958.

That series dealt with the continuing adventures of my heroes on various planets of the solar system, and in each case, I carefully described the planets in strict accordance with what was known about them at the time.

Unfortunately, it was in the course of those very years that microwave astronomy was developed and shortly after those years that rocket probes began to be sent out. The result was that our knowledge of the solar system was startlingly advanced and we learned something new and unexpected about every single planet.

For instance, in my description of Mercury in Lucky Starr and the Big Sun of Mercury, I had it facing one side to the Sun, as astronomers then thought - and that was essential to the plot. As it happens, however, we now know that Mercury turns slowly and that every portion of its surface gets sunlight part of the time. There is no "dark side."

In my description of Venus in Lucky Starr and the Oceans of Venus, I had a planetwide ocean, which, at that time, seemed at least possible. It was essential to the plot as well. However, we now know that the surface of Venus is at a temperature far above the boiling point of water, and an ocean - or even a drop - of liquid water on its surface is totally impossible.

As for Mars, in my book David Starr: Space Ranger, I managed to get the description right in many ways. However, I didn't take advantage of the huge extinct Martian volcanoes that were discovered about fifteen years after the book was published. What's more, I did talk about the